MOSFET for producing a constant voltage

Details MOSFET for producing a constant voltage MOSFET for producing a constant voltage

1989-04-10

1990-08-07

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307491, 323313, H03K 301, G06G 710

Patent

active

049470566

ABSTRACT:
A circuit for producing a constant voltage comprises first and second MOSFETs, and first and second bias voltage producing devices. The first and second MOSFETs to which first and second input voltages are applied, respectively, are connected in series. The first bias voltage producing device produces a potential difference, which is equal to a threshold voltage of the first MOSFET, to be applied across drain and gate of the first MOSFET, and the second bias voltage producing device produces a potential difference, which is equal to a threshold voltage of the second MOSFET, to be applied across drain and gate of the second MOSFET, so that a wide range of an output voltage is produced at a connecting point of the first and second MOSFETs. Even more, the output voltage is stabilized in level, even if the threshold voltages fluctuate in a semiconductor device fabricating process.

REFERENCES:
patent: 4686451 (1987-08-01), Li et al.
patent: 4692689 (1987-09-01), Takemae
patent: 4694199 (1987-09-01), Goetz
patent: 4752699 (1988-06-01), Cranford, Jr. et al.
patent: 4788455 (1988-11-01), Mori et al.
patent: 4833342 (1989-05-01), Kiryu et al.

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